1
Alan F Hassett: Wastewater biological treatment system and method therefor. The White Oak Partnership, Akin Gump Strauss Hauer & Feld, April 4, 2006: US07022235 (3 worldwide citation)

A biological treatment system, including a wastewater system drain field and at least one perforated distribution pipe located within the drain field and adapted to receive effluent. At least one perforated outer pipe surrounds the at least one distribution pipe to receive effluent from the at least ...


2
Hassett Alan F: Wastewater biological treatment system and method therefor. White Oak Partnership, July 6, 2005: EP1549590-A1

A biological treatment system having a wastewater drain field (150) and at least one perforated distribution pipe (52) within the drain field. A perforated outer pipe (80) surrounds the distribution pipe to receive effluent from the distribution pipe and dispense the effluent to the drain field afte ...


3
Alan F Hassett: Wastewater biological treatment system and method therefor. The White Oak Partnership, Akin Gump Strauss Hauer & Feld, June 17, 2004: US20040112809-A1

A biological treatment system, including a wastewater system drain field and at least one perforated distribution pipe located within the drain field and adapted to receive effluent. At least one perforated outer pipe surrounds the at least one distribution pipe to receive effluent from the at least ...


4
Hassett Alan F: Wastewater biological treatment system and method therefor. The White Oak Partnership, BELISARIO Martin G, April 1, 2004: WO/2004/026771

A biological treatment system having a wastewater drain field (150) and at least one perforated distribution pipe (52) within the drain field. A perforated outer pipe (80) surrounds the distribution pipe to receive effluent from the distribution pipe and dispense the effluent to the drain field afte ...